LXR linux/arch/powerpc/kvm/booke.h

   1/*
   2 * This program is free software; you can redistribute it and/or modify
   3 * it under the terms of the GNU General Public License, version 2, as
   4 * published by the Free Software Foundation.
   5 *
   6 * This program is distributed in the hope that it will be useful,
   7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9 * GNU General Public License for more details.
  10 *
  11 * You should have received a copy of the GNU General Public License
  12 * along with this program; if not, write to the Free Software
  13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14 *
  15 * Copyright IBM Corp. 2008
  16 *
  17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18 */
  19
  20#ifndef __KVM_BOOKE_H__
  21#define __KVM_BOOKE_H__
  22
  23#include <linux/types.h>
  24#include <linux/kvm_host.h>
  25#include <asm/kvm_ppc.h>
  26#include <asm/switch_to.h>
  27#include "timing.h"
  28
  29/* interrupt priortity ordering */
  30#define BOOKE_IRQPRIO_DATA_STORAGE 0
  31#define BOOKE_IRQPRIO_INST_STORAGE 1
  32#define BOOKE_IRQPRIO_ALIGNMENT 2
  33#define BOOKE_IRQPRIO_PROGRAM 3
  34#define BOOKE_IRQPRIO_FP_UNAVAIL 4
  35#define BOOKE_IRQPRIO_SPE_UNAVAIL 5
  36#define BOOKE_IRQPRIO_SPE_FP_DATA 6
  37#define BOOKE_IRQPRIO_SPE_FP_ROUND 7
  38#define BOOKE_IRQPRIO_SYSCALL 8
  39#define BOOKE_IRQPRIO_AP_UNAVAIL 9
  40#define BOOKE_IRQPRIO_DTLB_MISS 10
  41#define BOOKE_IRQPRIO_ITLB_MISS 11
  42#define BOOKE_IRQPRIO_MACHINE_CHECK 12
  43#define BOOKE_IRQPRIO_DEBUG 13
  44#define BOOKE_IRQPRIO_CRITICAL 14
  45#define BOOKE_IRQPRIO_WATCHDOG 15
  46#define BOOKE_IRQPRIO_EXTERNAL 16
  47#define BOOKE_IRQPRIO_FIT 17
  48#define BOOKE_IRQPRIO_DECREMENTER 18
  49#define BOOKE_IRQPRIO_PERFORMANCE_MONITOR 19
  50/* Internal pseudo-irqprio for level triggered externals */
  51#define BOOKE_IRQPRIO_EXTERNAL_LEVEL 20
  52#define BOOKE_IRQPRIO_DBELL 21
  53#define BOOKE_IRQPRIO_DBELL_CRIT 22
  54#define BOOKE_IRQPRIO_MAX 23
  55
  56#define BOOKE_IRQMASK_EE ((1 << BOOKE_IRQPRIO_EXTERNAL_LEVEL) | \
  57                          (1 << BOOKE_IRQPRIO_PERFORMANCE_MONITOR) | \
  58                          (1 << BOOKE_IRQPRIO_DBELL) | \
  59                          (1 << BOOKE_IRQPRIO_DECREMENTER) | \
  60                          (1 << BOOKE_IRQPRIO_FIT) | \
  61                          (1 << BOOKE_IRQPRIO_EXTERNAL))
  62
  63#define BOOKE_IRQMASK_CE ((1 << BOOKE_IRQPRIO_DBELL_CRIT) | \
  64                          (1 << BOOKE_IRQPRIO_WATCHDOG) | \
  65                          (1 << BOOKE_IRQPRIO_CRITICAL))
  66
  67extern unsigned long kvmppc_booke_handlers;
  68extern unsigned long kvmppc_booke_handler_addr[];
  69
  70void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr);
  71void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr);
  72
  73void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr);
  74void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr);
  75void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);
  76void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits);
  77
  78int kvmppc_booke_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
  79                            unsigned int inst, int *advance);
  80int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val);
  81int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val);
  82
  83/* low-level asm code to transfer guest state */
  84void kvmppc_load_guest_spe(struct kvm_vcpu *vcpu);
  85void kvmppc_save_guest_spe(struct kvm_vcpu *vcpu);
  86
  87/* high-level function, manages flags, host state */
  88void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu);
  89
  90void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
  91void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu);
  92
  93enum int_class {
  94        INT_CLASS_NONCRIT,
  95        INT_CLASS_CRIT,
  96        INT_CLASS_MC,
  97        INT_CLASS_DBG,
  98};
  99
 100void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type);
 101
 102/*
 103 * Load up guest vcpu FP state if it's needed.
 104 * It also set the MSR_FP in thread so that host know
 105 * we're holding FPU, and then host can help to save
 106 * guest vcpu FP state if other threads require to use FPU.
 107 * This simulates an FP unavailable fault.
 108 *
 109 * It requires to be called with preemption disabled.
 110 */
 111static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
 112{
 113#ifdef CONFIG_PPC_FPU
 114        if (vcpu->fpu_active && !(current->thread.regs->msr & MSR_FP)) {
 115                load_up_fpu();
 116                current->thread.regs->msr |= MSR_FP;
 117        }
 118#endif
 119}
 120
 121/*
 122 * Save guest vcpu FP state into thread.
 123 * It requires to be called with preemption disabled.
 124 */
 125static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
 126{
 127#ifdef CONFIG_PPC_FPU
 128        if (vcpu->fpu_active && (current->thread.regs->msr & MSR_FP))
 129                giveup_fpu(current);
 130#endif
 131}
 132#endif /* __KVM_BOOKE_H__ */
 133